Instrument lens and dial



Nov. 11, 1947.

Arran/vn.

Patented Nov. 11, 1947 Henry F. Pearson, Langhorne, Pa., assignor to Rhm & Haas Company, Philadelphia, Pa., a

corporation of Delaware Application August s, 1945, serial No. 609,192

(ci. 4o13o v 1 Claim.

The present invention relates to a lens for an instrument such as clocks, watches, or the like, which serves both as a cover and as a dial.

In accordance with this invention, there is provided a lens of transparent material, such as glass or transparent plastic, for instance, a polymerized acrylic, having about its periphery an enlarged portion in the form of a prism. Indicia are placed about the outer side of the enlarged prismatic portion of the lens and are reected on the hypothenuse of the prism so'that when the lens is viewed from the front the indicia appear upon its face. 1

Further details respecting the invention will be evident from the accompanying drawing and description, wherein there is disclosed an illustrative embodiment thereof.

In the drawing, Fig. 1 represents a iront view of a lens showing indicia as they appear by reection; Fig. 2 is an end view o1' the lens, lookzo I claim: A lens having a face with front andrear surfaces and having about its periphery a prism extending fromv its rear surface. a portion of theA face forming one side of the prism, a second side of the prism extending substantially perpendicular to the face, and the hypothenuse of the prism extending inwardly toward the rear surface, the perpendicular side of the 4prism having indicia thereupon. y

. HENRY F. PEARsoN.

REFERENCES CITED The following references are ofrecord in the illev orthis patent:

UNITED STATES PATENTS 

